Electric stop-motion for drawing-frames



(NoModeL) V. I. CUMNOGK. ELECTRIC STOP MOTION FOR DRAWING FRAMES, 6w. N0. 408,829. Patented Aug. 13, 1889.

. i 4 F??? u am. w 9 I NY PETERS, Phnlo-Lithognpher, Washington, D. C.

UNITED STATES PATENT @EFICE.

VICTOR I. OUMNOCK, OF LOIVELL, MASSACHUSETTS.

ELECTRIC STOP-MOTION FOR DRAWING-FRAMES, 800.

SPECIFICATION foi ming part of Letters Patent No. 408,829, dated August 13, less.

Application filed January 25, 1889. Serial No. 297,532. (No model.)

To all whom, it may concern.-

Be it known that I, VICTOR I. OUMNOCK, a citizen of the United States, residing at Lowell, in the county of MiddleseX and Commonwealth of lvlassach usetts, have invented a certain new and useful Improvement in Electric Stop-Motions for Drawing-Frames,&c., of which, the following is a specification.

My invention relates to electric stop-motions; and it consists in the devices and combinations hereinafter described and claimed, whereby the closing of an open electrical circuit by the failure of the work causes a stoppage of the machine to which such stop-motion is applied.

In theaccompanying drawings, Figure 1 is a side elevation of so much of a drawingframe or fiy-frame as is necessary for the understanding of my invention and of my improved stop-motion applied thereto; Fig. 2, an enlarged side elevation of the upper part of what is shown in Fig. 1, omitting the upper part of the roll-stand and the drawing-rolls; Fig. 3, a plan of a portion of the machine shown in Fig. 1, showing the battery and connections and the switch.

The machine shown may represent any machine in which a failure of the work allows an automatically-acting circuit-closer to opcrate.

The frame A supports the drawing-roll stand B, in which turn the drawing-rolls O, driven by any usual means (no means being shown) which connect them with the shaft D of the machine. The pulley E turns loosely on said shaft D and forms the cone-box of a friction-clutch E, the counterpart or cone plug E of which is capable of sliding endwise on the shaft D, but is prevented from turnin g thereon by a spline d, secured to saidshaft and entering a groove 6, leading out of the shaft-eye of said cone-plug. The hub e of the cone-plug is provided with an annular groove e to receive the fork f of the shiftinglever F said shifting-lever being pivoted on a bracket a, secured to the frame A below said hub e in such a manner as to swing in a vertical plane to open or close said clutch, and the upper end of said lever being providedwithavertical handle f. The shiftinglever F moves in a slotted guide-plate G,which has a shoulder g to retain said lever in the position it occupies when the clutch is closed and the machine is running, the lever being moved toward the frame to close the clutch and then backward to engage the shoulder. A spring f arranged between said lever F and the frame of the machine, throws the lever outward to open the clutch when said lever is forward far enough to clear said shoulder.

The machine may be driven by a belt connecting the pulley E to a driving-shaft. The foregoing parts are of any usual construction and operation.

Fast and loose pulleys maybe used in place of the clutch and the driving-belt be shifted from one to the other to stop and start the machine by a fork secured to a spring shifting-lever F ina well-known manner.

A gear H is secured to shaft D of the machine and engages with a pinion I, turning on a horizontal stud 1', supported on the frame A. An eccentric J is secured to and turns with the pinion I, and is connected by the strap j and rod j to the lower end of the lever K, which turns on a horizontal pivot is, projecting from a bracket to, or part of the frame. The upper end of said lever K is provided with a segmental gear is, which is concentric with the pivot is and engages a rack Z, secured to a horizontal rod L.

The rod L is caused to reciprocate by its connection with the gear H longitudinally in brackets a (b on the frame A, and, being arranged behind the shifting-lever, when the latter is in the posit-ion it occupies while the machine is running in its forward movement almost (but not quite) strikes the back of said shifting-lever.

A U-shaped magnetcarriage m is supported on the rod L in front of the brackets a a and allows said rod to slide freely through it, but is normally prevented from sliding with said rod by a spring m, 0011- nected to hooks m m respectively, secured to the bracket a and said carriage, and drawing said carriage on back against the bracket On the carriage m is supported an elec tro-magnet M, arid an armature-lever m is pivoted at m on said carriage, the front end of which armature reaches nearly to the shifting-lever, and is bent upward at m in such a manner that when the rear arm of said armature is attracted by said magnet the armature turns upon its pivot m and the bent front end m of said armature is thrown up in front of the rod L and is struck by said rod and carried forward against said shifting-lever,throwingsaidshifting-leverforward clear of the shoulder 1 the carriage m and magnet M being carried along by the armature against the resistance of the spring in. The shifting-lever, after being released, is thrown by the spring outward and opens the clutch E and allows the machine to stop. The magnet M is connected to the opposite poles of a battery 0 or other generator of electricity by metallic wires 1 N p n, and the circuit contains a switch 1 normally closed when the machine is in operation, but otherwise open, and an automatic circuit-closer P normally open, but allowed to operate upon a failure of the work. The switch P consists of a pair of metallic springs 17 p (terminating sections of the wire 1), supported out of contact with each other on insulating ma terial p on the frame A of the machine) and a metallic spring'plug f, consisting, preferably, of a lcaf-spring secured at the middle to said shiftingdever and doubled and having its ends turned away from each other, as shown in Fig. 3, so that when the clutch is closed the plug j'" is between the springs p p and, :lforcing them apart, makes a perfect contact. The automatic eircuit-closerP consists of an insulated conducting-strip p, which extends along the whole series of rol1- stands B parallel with them and rests upon a strip p of insulating material and terminates a section of the wire p. The adjacent section of the wirep enters a rod 1), which is arranged parallel with the stud 11", and there are as many drops p pivoted on said rod p as there are slivers S, each drop having at its free end an eye through which a sliver S passes to the drawing-rolls C in the usual manner, the drops being held up in an inclined position (see Fig. 1) by the slivers as long as said slivers remain unbroken, but falling down by their own gravity onto the strip p into the position shown by dotted lines in Fig. 2. The rod 1) and drops 12 are metallic, and the falling of any drop closes the circuit, when the switch 1 is closed, and causes the armature to be attracted and the shifting'lever to be struck and moved, as above described, and the machine to be stopped. \Vhen the machine is thus stopped, the switch 1 is opened by the withdrawal of the plug 1" from between the springs 1) 1F, and the machine is cut out of circuit, and the battery thereby prevented from running down.

Any number of stop-motions may be connected with the same generator of electricity in multiple series, as will be understood from Fig. 5, and said generator may be a dynamo. The plug 1 may be omitted, and the lever 11,

which is metallic, will serve to connect the springs 1) 1:

The rolls (1 might be arranged to be held out of contact with each other by the yarn, thread, or slivers and to close the circuit when these break, where a single sliver is used between such rolls; or rolls may be employed simply as circuit-closers, one roll 01. a pair resting upon the top ot the work and by the work held out of contact with the lower roll, and the work may be the sliver in a drawingframe or a sheet of paper in a printing-press, in such cases the rolls termimtting adjacent sections of the line.

The switch, though not absolutely indis pensable, is very desirable, because by its use the circuit is immediately broken when the shifting-lever is moved to stop the machine, the heating of the parts of the eircuitcloser and sparking of the same, with the consequent danger of fire, being thereby prevented.

I claim as my invention- 1. In an electric stop-motion, an electric eir cuit containing a circuit-closer normally held open by the work, but automatically closing upon a failure of the work, in combination with a spring-actuated shifting-lever normally looked, a reciprocating bar, a carriage supported on said bar, but normally at rest, an electro-magnet arranged in said circuit, an armaturedever pivoted on said carriage and attracted by said magnet upon the closing of said circuit, and having a bent end adapted, when said armature is so attracted, to interpose between said bar and said lever and to be pushed by said bar against said lever and to draw said carriage with said bar and to unlock said love as and for the purpose specified.

In an electric stop-motion,an electric circuit containing a circuit-closer normallyludd' open by the work, but automatically closing upon a failure of the work, and containing also a switch, in combination with a springactuatcd shifting'lever normally locked and closing said switch, a reciprocating bar, a carriage supported on said bar, but normally at rest, an electro-magnet arranged in said. circuit, an armature-lever pivoted on said carriage and attracted by said magnet upon the closing of said circuit, and having a bent end adapted, when said armature is so attracted, to interpose between said bar and said lever and to be pushed by said bar against said lever and to draw said carriage with said bar and to unlock said lever, as and for the purpose specified.

In witness whereof I have signed this specification, in the presence oi. two attesting witnesses, this 22d day of January, A. l). 1880.

Witnesses:

Amnan'r M. Moonn, Mvn'rin (3. Bears. 

